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18 EXECUTIVE BRIEFING EXECUTIVE BRIEFING 4 The SpheriKA has an enhanced prosthetic trochlea that accommodates the wide range of valgus femoral component placements needed to resurface the pre-arthritic knee with the KA technique and offers better lateral bone coverage. A preliminary study showed that the GMK SpheriKA better suits patients with the more variable anatomies and helps to facilitate patellofemoral tracking in nearly all cases, compared to only 69% with an MA-designed 6° valgus femoral component 22 . We are optimistic that the combination of the FDA-approved Kinematic Alignment Platform with the GMK Sphere launched in 2018, along with an upgrade to the GMK SpheriKA in 2024, will lead to a new path in knee replacement that will enhance the surgeon's ability to provide better clinical outcomes to their patients. References: 1. Sloan M, Premkumar A, Sheth NP. Projected Volume of Primary Total Joint Arthroplasty in the U.S., 2014 to 2030. J Bone Joint Surg Am. 2018 Sep 5;100(17):1455-1460. doi: 10.2106/JBJS.17.01617. PMID: 30180053. 2. Beswick AD, Wylde V, Gooberman-Hill R, et al. What proportion of patients report long-term pain after total hip or knee replacement for osteoarthritis? A systematic review of prospective studies in unselected patients. BMJ Open 2012;2:e000435. doi: 10.1136/bmjopen-2011-000435 3. Bourne RB, Chesworth BM, Davis AM, Mahomed NN, Charron KD. Patient satisfaction after total knee arthroplasty: who is satisfied and who is not? Clin Orthop Relat Res. 2010 Jan;468(1):57-63. doi: 10.1007/s11999-009-1119-9. PMID: 19844772; PMCID: PMC2795819. 4. Mathis DT, Hauser A, Iordache E, Amsler F, Hirschmann MT. Typical Pain Patterns in Unhappy Patients After Total Knee Arthroplasty. J Arthroplasty. 2021 Jun;36(6):1947-1957. doi: 10.1016/j.arth.2021.01.040. Epub 2021 Jan 22. PMID: 33583666. 5. Hoveidaei AH, Esmaeili S, Ghaseminejad-Raeini A, Pirahesh K, Fallahi MS, Sandiford NA, Citak M. Robotic assisted Total Knee Arthroplasty (TKA) is not associated with increased patient satisfaction: a systematic review and meta-analysis. Int Orthop. 2024 May 6. doi: 10.1007/s00264-024-06206-4. Epub ahead of print. PMID: 38705892. 6. Kirchner, Gregory J. MD, MPH1; Stambough, Jeffrey B. MD2; Jimenez, Emily MPH3; Nikkel, Lucas E. MD4. Robotic-assisted TKA is Not Associated With Decreased Odds of Early Revision: An Analysis of the American Joint Replacement Registry. Clinical Orthopaedics and Related Research 482(2):p 303-310, February 2024. | DOI: 10.1097/CORR.0000000000002783 7. Alrajeb, R., Zarti, M., Shuia, Z. et al. Robotic-assisted versus conventional total knee arthroplasty: a systematic review and meta-analysis of randomized controlled trials. Eur J Orthop Surg Traumatol 34, 1333–1343 (2024). https://doi.org/10.1007/s00590-023-03798-2 8. Howell SM, Nedopil AJ, Hull ML. Negligible effect of surgeon experience on the accuracy and time to perform unrestricted caliper verified kinematically aligned TKA with manual instruments. Knee Surg Sports Traumatol Arthrosc 30(9): 2966, 2022 9. Elbuluk AM, Jerabek SA, Suhardi VJ, Sculco PK, Ast MP, Vigdorchik JM. Head-to-Head Comparison of Kinematic Alignment Versus Mechanical Alignment for Total Knee Arthroplasty. J Arthroplasty. 2022 Aug;37(8S):S849-S851. doi: 10.1016/j.arth.2022.01.052. Epub 2022 Jan 31. PMID: 35093548. 10. Courtney PM, Lee GC. Early Outcomes of Kinematic Alignment in Primary Total Knee Arthroplasty: A Meta-Analysis of the Literature. J Arthroplasty. 2017 Jun;32(6):2028-2032.e1. doi: 10.1016/j.arth.2017.02.041. Epub 2017 Feb 27. PMID: 28341278. 11. Dossett HG, Estrada NA, Swartz GJ, LeFevre GW, Kwasman BG. A randomised controlled trial of kinematically and mechanically aligned total knee replacements. Bone Joint J. 2014;96-B(7):907-913. doi:10.1302/0301-620X.96B7.32812 12. Howell SM, Akhtar M, Nedopil AJ, Hull ML. Reoperation, Implant Survival, and Clinical Outcome After Kinematically Aligned Total Knee Arthroplasty: A Concise Clinical Follow-Up at 16 Years. J Arthroplasty. 2024 Mar;39(3):695-700. doi: 10.1016/j.arth.2023.08.080. Epub 2023 Sep 1. PMID: 37659680. 13. Dossett HG, Arthur JR, Makovicka JL, Mara KC, Bingham JS, Clarke HD, Spangehl MJ. A Randomized Controlled Trial of Kinematically and Mechanically Aligned Total Knee Arthroplasties: Long-Term Follow-Up. J Arthroplasty. 2023 Mar;38(6):S209-S214. doi:10.1016/j.arth.2023.03.065. 14. Alexander JS, Morris MJ, Lombardi AV Jr, Berend KR, Crawford DA. Influence of Kinematic Alignment on Soft Tissue Releasing and Manipulation Under Anesthesia Rates in Primary Total Knee Arthroplasty. Surg Technol Int. 2022 Oct 20;41:sti41/1641. doi: 10.52198/22.STI.41.OS1641. Epub ahead of print. PMID: 36265123. 15. MacDessi SJ, Griffiths-Jones W, Harris IA, Bellemans J, Chen DB. Coronal Plane Alignment of the Knee (CPAK) classification. Bone Joint J. 2021 Feb;103-B(2):329-337. doi: 10.1302/0301-620X.103B2.BJJ-2020-1050.R1. PMID: 33517740; PMCID: PMC7954147. 16. Lozano R, Campanelli V, Howell S, Hull M. Kinematic alignment more closely restores the groove location and the sulcus angle of the native trochlea than mechanical alignment: implications for prosthetic design. Knee Surg Sports Traumatol Arthrosc. 2019 May;27(5):1504-1513. doi: 10.1007/ s00167-018-5220-z. Epub 2018 Oct 24. PMID: 30357423. 17. Rivière C, Iranpour F, Harris S, Auvinet E, Aframian A, Parratte S, Cobb J. Differences in trochlear parameters between native and prosthetic kinematically or mechanically aligned knees. Orthop Traumatol Surg Res. 2018 Apr;104(2):165-170. doi: 10.1016/j.otsr.2017.10.009. Epub 2017 Dec 6. PMID: 29223778. 18. Rivière C, Dhaif F, Shah H, Ali A, Auvinet E, Aframian A, Cobb J, Howell S, Harris S. Kinematic alignment of current TKA implants does not restore the native trochlear anatomy. Orthop Traumatol Surg Res. 2018 Nov;104(7):983-995. doi: 10.1016/j.otsr.2018.05.010. Epub 2018 Jun 28. PMID: 29960090. 19. Rosa SB, Hazratwala K, Wilkinson MPR. Mismatch between trochlear coronal alignment of arthritic knees and currently available prosthesis: a morphological analysis of 4116 knees and 45 implant designs. Knee Surg Sports Traumatol Arthrosc 31(8): 3116, 2023 20. David F. Scott, Celeste G. Gray. Outcomes are Better With a Medial-Stabilized vs a Posterior-Stabilized Total Knee Implanted With Kinematic Alignment. The Journal of Arthroplasty. Volume 37, Issue 8, Supplement. 2022. Pages S852-S858,ISSN 0883-5403. https://doi.org/10.1016/j.arth.2022.02.059. 21. Elorza SP, O'Donnell E, Nedopil AJ, Howell SM, Hull ML. A new tibial insert design with ball-in-socket medial conformity and posterior cruciate ligament retention closely restores native knee tibial rotation after unrestricted kinematic alignment. J Exp Orthop 10(1): 115, 2023 22. Sappey-Marinier E, Howell SM, Nedopil AJ, Hull ML. The Trochlear Groove of a Femoral Component Designed for Kinematic Alignment Is Lateral to the Quadriceps Line of Force and Better Laterally Covers the Anterior Femoral Resection Than a Mechanical Alignment Design. J Pers Med. 2022 Oct 16;12(10):1724. doi: 10.3390/jpm12101724. PMID: 36294863; PMCID: PMC9605321. Medacta is a global key player specializing in the design, production, and distribution of innovative, personalized, and sustainable solutions for joint replacement, sports medicine, and spine surgery. Established in 1999 in Switzerland, Medacta is committed to improving the care and well-being of patients and maintains a strong focus on healthcare sustainability. Through close collaboration with expert surgeons globally, continuous investments in R&D, and the adoption of cutting-edge technologies, Medacta's innovation prioritizes minimally invasive surgery and personalized solutions for every patient. Through the M.O.R.E. Institute, Medacta supports surgeons with a comprehensive and tailored program dedicated to the advancement of medical education. Medacta is headquartered in Castel San Pietro, Switzerland, and operates in over 60 countries. Follow us on Medacta TV, YouTube, LinkedIn and X.